Related Manuals for VERDER Carbolite Gero LHT 4/120
Summary of Contents for VERDER Carbolite Gero LHT 4/120
- Page 1 Installation, Operation and Maintenance Instructions 400°C Laboratory High Temperature Oven - LHT Model: 120 Litres No Controller LHT 4/120 + No Controller MEN-LHT4120-006_NOCTRL (18-10-2021)
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Page 2: Table Of Contents
Contents This manual is for guidance on the use of the Carbolite Gero product specified on the front cover. This manual should be read thoroughly before unpacking and using the furnace or oven. The model details and serial number are shown on the back of this manual. - Page 3 6.3.2 Internal Element Cover Temperature Controller Replacement Solid-State Relay Replacement Thermocouple Replacement Element Replacement Fuse Replacement 7.0 Fault Analysis Oven Does Not Heat Up Oven Overheats 8.0 Wiring Diagrams WV-11-01 WS-10-01 - Isolating for 208 V version only 9.0 Fuses and Power Settings Fuses Power Settings 10.0 Specifications...
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Page 4: Symbols And Warnings
1.0 Symbols and Warnings Switches and Lights Instrument switch: when the instrument switch is operated the temperature control circuit is energised. Solenoid valve (if fitted): see section 4.6 for full details Variable speed fan (if fitted): see section 4.7 for full details Exhaust fan (if fitted): see section 4.8 for full details Stoving and curing (if fitted): see section 4.9 for full details General Warnings... - Page 5 DANGER – Read any warning printed next to this symbol. Caution – Double Pole/Neutral Fusing...
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Page 6: Installation
2.0 Installation Unpacking and Handling When unpacking or moving the product, always lift by its base; do not use the door or any other projecting cover or component to support the equipment when moving it. Use a fork lift or pallet truck to move the product; position the product on a level surface and use an adequate number of personnel to safely move the product into position. -
Page 7: Electrical Connections
Depending on the application of the product, it may be appropriate to position it under an extraction hood. Ensure the extraction hood is switched on during use. Ensure that the product is placed in such a way that it can be quickly switched off or disconnected from the electrical supply. - Page 8 When the mains cable is factory fitted, internal fuses are also fitted. It is essential that the operator ensures that the product is correctly fused. Products with a factory fitted supply cable are designed to be wired directly to an isolator or fitted with a line plug.
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Page 9: Temperature Controller
3.0 Temperature Controller If this product is fitted with a temperature controller, instructions are provided separately. -
Page 10: Operation
4.0 Operation Operating Cycle The product is fitted with an instrument switch. The switch cuts off power to the controllers and elements. The circulation fan will operate when the instrument switch is on. An optional door switch may be fitted. If so, ensure that the door is closed to operate the fans and heating elements. -
Page 11: Atmospheres
Atmospheres When an optional gas inlet is fitted, there is a label near the inlet saying "INERT GAS ONLY". In practice, inert or oxidising gases may be used, but not combustible or toxic gases. The chamber is not gas tight, the gas usage may be high and the chamber is always likely to contain some air. -
Page 12: Variable Speed Fan (If Fitted)
Variable Speed Fan (if fitted) If fitted, the variable speed control is fitted in the air circulation fan circuit. A panel mounted rotary dial is used to control the speed. Please note that there is a minimum setting at which the fan motor starts up when the product is switched on. -
Page 13: Maintenance
5.0 Maintenance General Maintenance Preventive rather than reactive maintenance is recommended. The type and frequency depends on the product use; the following are recommended. Maintenance Schedule CUSTOMER QUALIFIED PERSONNEL DANGER! ELECTRIC SHOCK. Risk of fatal injury. Only electrically qualified personnel should attempt these maintenance procedures. Frequency Maintenance Method... - Page 14 Performance Check whether the cooling fans are Cooling Fans (if fitted) working Circulating Fan Visual check to see if it is running (if fitted) Circulating Fan Check bearings and replace if neces- (if fitted) sary Element Circuit Electrical measurement Measure the current drawn on each Power Consumption phase / circuit Shelves...
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Page 15: Cleaning
5.2.1 Cleaning The product's outer surface may be cleaned with a damp cloth. Do not allow water to enter the interior of the case or chamber. Do not clean with organic solvents. Under no circumstances should any objects be placed on top of the product. - Page 16 In some cases the supply voltage may be outside the range 220-240 V or the 3-phase equivalent, the power limit parameter may be set to a value other than 100%. Do not increase the value to 100%, see section 9.0 for details of power limit settings.
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Page 17: Repairs And Replacements
6.0 Repairs and Replacements Safety Warning - Disconnection from Power Supply Immediately switch the product off in the event of unforeseen circumstances (e.g. large amount of smoke). Allow the product to return to room temperature before inspection. Always ensure that the product is disconnected from the electrical supply before repair work is carried out. -
Page 18: Panel Removal
6.3 Panel Removal Disconnect the product from the electrical supply. 6.3.1 Side Panel The side panel is located on the right-hand side of the product. To gain access to the products electrical components: 1. Remove all screws holding the panel in place. The bottom of the panel is con- structed in such a way that it will hinge downwards and allow access to electrical components without the need to remove the panel entirely 2. -
Page 19: Temperature Controller Replacement
Temperature Controller Replacement Refer to the controller instructions for more information on how to replace the temperature controller. Solid-State Relay Replacement Disconnect the product from the power supply and remove the appropriate cover as given above. 1. Make a note of the wire connections to the solid state relay, then disconnect them. 2. -
Page 20: Fuse Replacement
Fuse Replacement Fuses are accessed by removal of the appropriate panel, as described in the 'Panel Removal' section. Depending on the model, supply fuses and control circuit fuses may be mounted in their own holders, or may be on a circuit board that contains an EMC filter. -
Page 21: Fault Analysis
7.0 Fault Analysis Oven Does Not Heat Up temperature No power from Check the fuses in the supply controller is supply line The controller shows a very high temperature The temperature sensor has temperature or a controller is broken or has a wiring fault code such as EEE or --- or S.br The SSR could be failing to... -
Page 22: Wiring Diagrams
8.0 Wiring Diagrams WV-11-01 F1, F2 Fuses Filter Instrument Switch Relay (Coil) R1/1, R1/2 Relay Contactor Temperature Controller Over-Temperature Controller Thermocouple Solid State Relay Element(s) If Fitted Live Neutral Earth PE (GR/Y) (Green+Yellow) -
Page 23: Ws-10-01 - Isolating For 208 V Version Only
WS-10-01 - Isolating for 208 V version only The transformer changes the supply voltage of the control circuit into the desired operating range for the controller and other components. The supply voltage as shown is taken from a single phase supply or from the phase-to- phase voltage of a 3-phase supply. -
Page 24: Fuses And Power Settings
9.0 Fuses and Power Settings Fuses F1-F2: Refer to the circuit diagrams. Fitted if supply cable fitted. Internal 38 mm x 10 mm type F fitted on Supply Fitted on board to some types EMC filter circuit board(s) Fuses of EMC filter. Fitted on board to some types 2 Amps glass type F of EMC filter. -
Page 25: Specifications
10.0 Specifications Carbolite Gero reserves the right to change the specification without notice. Approx Chamber Size (mm) Max Temp Max Power Net Weight Capacity Model (kg) (°C) (kW) Laboratory High Temperature Ovens LHT 4/120 2.25 10.1 Environment The models listed in this manual contain electrical parts and should be stored and used in indoor conditions as follows: Temperature: 5 °C - 40 °C... - Page 27 Notes Service Record Engineer Name Date Record of Work...
- Page 28 The products covered in this manual are only a small part of the wide range of ovens, chamber furnaces and tube furnaces manufactured by Carbolite Gero for laboratory and industrial use. For further details of our standard or custom built products please contact us at the address below, or ask your nearest stockist.
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